package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import lombok.RequiredArgsConstructor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@RequiredArgsConstructor
public class RefreshInterceptor implements HandlerInterceptor {


    private final StringRedisTemplate redisTemplate;

//    @Autowired
//    private StringRedisTemplate redisTemplate;


    @Override
     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
         // 1.获取请求头中的token
        String token = request.getHeader("authorization");

        if(StrUtil.isBlank(token)){
            return true;
        }


        //2. 获取token中的redis对象
        Map<Object, Object> userMap = redisTemplate.opsForHash().entries(RedisConstants.LOGIN_USER_KEY + token);

        //3. 判断用户是否存在
        if (userMap.isEmpty()) {
            return true;
        }

        // 5. 将查询到的hash数据转userdto
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);

        // 6.存在保存用户到threadlocal;
        UserHolder.saveUser(userDTO);

        // 7. 刷新token有效期
        redisTemplate.expire(RedisConstants.LOGIN_USER_KEY+token,RedisConstants.CACHE_SHOP_TTL, TimeUnit.MINUTES);

        // 8. 放行
        return true;
     }


    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUser();
    }

}
